Agency theory describes the relationship between principals (owners) and agents (managers) in a company. There is potential for conflict since the owners delegate decision-making authority to managers. This can lead to agency problems and costs if the managers' interests are not aligned with the owners' interests. Agency problems occur due to issues like moral hazard, adverse selection, and managers potentially pursuing their own interests over maximizing shareholder value. Solutions to the agency problem include structuring executive compensation contracts and plans to better align the interests of owners and managers.